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Tuning the Josephson diode response with an ac current

Seoane Souto, Rubén LU orcid ; Leijnse, Martin LU ; Schrade, Constantin ; Valentini, Marco ; Katsaros, Georgios and Danon, Jeroen (2024) In Physical Review Research 6(2).
Abstract

Josephson diodes are superconducting elements that show an asymmetry in the critical current depending on the direction of the current. Here, we theoretically explore how an alternating current bias can tune the response of such a diode. We show that for slow driving there is always a regime where the system can only carry zero-voltage dc current in one direction, thus effectively behaving as an ideal Josephson diode. Under fast driving, the diode efficiency is also tunable, although the ideal regime cannot be reached in this case. We also investigate the residual dissipation due to the time-dependent current bias and show that it remains small. All our conclusions are solely based on the critical current asymmetry of the junction, and... (More)

Josephson diodes are superconducting elements that show an asymmetry in the critical current depending on the direction of the current. Here, we theoretically explore how an alternating current bias can tune the response of such a diode. We show that for slow driving there is always a regime where the system can only carry zero-voltage dc current in one direction, thus effectively behaving as an ideal Josephson diode. Under fast driving, the diode efficiency is also tunable, although the ideal regime cannot be reached in this case. We also investigate the residual dissipation due to the time-dependent current bias and show that it remains small. All our conclusions are solely based on the critical current asymmetry of the junction, and are thus compatible with any Josephson diode.

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Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Research
volume
6
issue
2
article number
L022002
publisher
American Physical Society
external identifiers
  • scopus:85189325709
ISSN
2643-1564
DOI
10.1103/PhysRevResearch.6.L022002
language
English
LU publication?
yes
id
74667a21-37e4-4d22-9a23-ddbe2f6bbdb8
date added to LUP
2024-04-24 13:52:22
date last changed
2024-04-24 13:53:11
@article{74667a21-37e4-4d22-9a23-ddbe2f6bbdb8,
  abstract     = {{<p>Josephson diodes are superconducting elements that show an asymmetry in the critical current depending on the direction of the current. Here, we theoretically explore how an alternating current bias can tune the response of such a diode. We show that for slow driving there is always a regime where the system can only carry zero-voltage dc current in one direction, thus effectively behaving as an ideal Josephson diode. Under fast driving, the diode efficiency is also tunable, although the ideal regime cannot be reached in this case. We also investigate the residual dissipation due to the time-dependent current bias and show that it remains small. All our conclusions are solely based on the critical current asymmetry of the junction, and are thus compatible with any Josephson diode.</p>}},
  author       = {{Seoane Souto, Rubén and Leijnse, Martin and Schrade, Constantin and Valentini, Marco and Katsaros, Georgios and Danon, Jeroen}},
  issn         = {{2643-1564}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Research}},
  title        = {{Tuning the Josephson diode response with an ac current}},
  url          = {{http://dx.doi.org/10.1103/PhysRevResearch.6.L022002}},
  doi          = {{10.1103/PhysRevResearch.6.L022002}},
  volume       = {{6}},
  year         = {{2024}},
}